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.force file

.force file

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.force file

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The .force file is an OptiStruct ASCII format results file.

File Creation

Creation of this file is controlled by the FORCE (ELFORCE) I/O Option.

File Contents

Result

Description

Force

Force results from linear static analysis for ELAS (CELAS1, CELAS2, CELAS3, CELAS4), ROD (CROD), BAR (CBAR, CBEAM), BUSH (CBUSH), PLATE (CQUAD, CTRIA), and GAP (CGAP) elements.

File Format

The file is divided up by iteration.  Output from each iteration starts with a line in the following format:

 ITER                Iteration_number                Number_of_subcases

where:

ITERis a keyword denoting the beginning of a new iteration.
Iteration_numberis the Iteration number.
Number_of_subcasesis the number of subcases for which this output is created.

 

Each iteration section is divided up by subcase. Output for each subcase starts with a line in the following format:

Id        Number_of_elements        Frequency        LOAD:Spc_id(Datatype)                subcase_label

where:

ID

is the output identification number for the subcase.
This is not the same as the subcase ID used in the input data.

Number_of_elements

is the number of elements for which this output is requested.

Frequency

is 1.0 for static analysis.

LOAD

is a keyword declaring applied load information.

Spc_id

is the SID for SPC's referenced by this subcase.

(Datatype)

is a keyword indicating the type of subcase involved.

(LOAD) declares data is for a linear static subcase.

Each subcase section is divided up by element-type. Output for each element-type section starts with one of the following formats (depending on the elements present in the model):

ELAS #

FORCE

 

 

 

 

 

 

 

ROD#

FORCE-A

FORCE-B

 

 

 

 

 

 

BUSH#

F-X

F-Y

F-Z

M-X

M-Y

M-Z

 

 

BAR#

END

AXIAL

SHEAR-1

SHEAR-2

TORQUE

BENDING-1

BENDING-2

 

PLATE#

MEMB-X

MEMB-Y

MEMB-XY

BEND-X

BEND-Y

TWIST-XY

SHEAR-XZ

SHEAR-YZ

GAP#

COMP-X

SHEAR-Y

SHEAR-Z

 

 

 

 

 

Element force output is then listed under these headings, depending on the type of elements for which this output was selected. The format of the element output matches the corresponding header, that is for ROD elements you would get FORCE-A and FORCE-B; whereas, for PLATE elements you would get MEMB-X, MEMB-Y, MEMB-XY, BEND-X, BEND-Y, TWIST-XY, SHEAR-XZ, SHEAR-YZ.

The format is:

 Eid                value1                value2                value3                …

where:

Eidis the element identification number.
value#is the Force result corresponding to the column header.

Comments

1.The I/O option RESULTS controls the frequency of output for analytical results during an optimization.